Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D25/00—Charging, supporting, and discharging the articles to be cooled
  • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
  • F25D25/024—Slidable shelves
  • F25D25/025—Drawers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
  • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
  • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
  • F25D17/042—Air treating means within refrigerated spaces
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D23/00—General constructional features
  • F25D23/08—Parts formed wholly or mainly of plastics materials
  • F25D23/082—Strips
  • F25D23/087—Sealing strips
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
  • F25D2317/04—Treating air flowing to refrigeration compartments
  • F25D2317/041—Treating air flowing to refrigeration compartments by purification
  • F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification

Definitions

• the invention relates to a crisper for storing food.
• the invention relates to a crisper for storing food with a controlled humidity.
• the food to be preserved can be placed in a container having a controlled environment.
• a refrigerator can be provided with a crisper.
• the crisper is a box used to keep fruits and vegetables stored in an environment where the humidity favors the preservation of the fruits and vegetables.
• It is an object of the present invention is to provide an improved crisper. This object is obtained by a crisper as set out in the appended claims.
• a crisper for preservation of food comprises a box and a top. When the crisper is in a closed position the box is air tight sealed to the top.
• the crisper comprises a humidity control unit adapted to allow humid air to exit the crisper via a humidity control membrane located in the humidity control unit.
• the humidity inside the crisper can be controlled by proper selection of the membrane and no further control is required to keep a proper humidity level inside the crisper which is otherwise sealed from the surroundings.
• the box is arranged as a drawer slidably insertable under the top.
• a sealable crisper drawer is provided that air tight to provide good preservation of food stored therein.
• the box comprises a gasket on the front side of the box.
• the gasket can be visible from the outside when the crisper is in a closed position.
• the gasket can extend to cover a part of the outside of the front side of the box.
• a sealing member that is easy to inspect is provided.
• a gasket can be provided on the front side of the top. The gasket can also be visible from the outside when the crisper is in a closed position.
• the humidity control unit is located in the top.
• the humidity control unit is easily accessible for service and maintenance.
• the humidity control unit can be located in the box.
• the crisper comprises two boxes. The boxes can then be separate and have different characteristics and be used for storing different type of food. In particular, each of the two boxes can have a separate humidity control unit.
• the humidity control membrane is a Tyvek membrane.
• a robust humidity control membrane that is easy to handle and manufacture is provided at the same time as a good humidity control is achieved.
• the humidity control membrane can have a size of 5 -10 cm 2 per liter of crisper volume.
• the humidity control unit has a liftable upper grid member at a top section of the humidity control unit.
• the humidity control membrane is located directly underneath the liftable upper grid member.
• the humidity control membrane can be easily removed for exchange or cleaning.
• a replaceable membrane used in a crisper for preservation of food is provided.
• the crisper comprises a box and a top. When the crisper is in a closed position, the box is air tight sealed to the top.
• the membrane has a size of 5 -10 cm 2 per liter of crisper volume. Hereby a controlled humidity inside the crisper can be obtained.
• the membrane can be a Tyvek membrane.
• Figure 2 shows a section of the crisper depicted in Figure 1
• FIG 3 is an exploded view of a humidity control unit of the crisper depicted in Figure 1,
• Figure 4 shows a crisper in accordance with another embodiment
• Figure 5 is an exploded view of a humidity control unit of the crisper depicted in Figure 4.
• FIG. ⁇ schematically shows a sealed crisper 10.
• the crisper 10 comprises a box 12 cooperating with a top 14.
• the box 12 can in accordance with one embodiment move relative to the top 14 to open/close the crisper.
• the crisper 10 can in accordance with some embodiments be arranged as a drawer.
• the box 12 can in accordance with one embodiment be provided with a front section 20 having a handle 22 provided thereon.
• a gasket 18 can be provided on either the front section 20 or the front section of the top 14 or both.
• the gasket 18 is formed around the edge of the front section 20 and/or the front section of the top 14 such that the sealing is visible from the outside when the crisper is in a closed position.
• the gasket 18 can be arranged to enclose the front section of the top 14 as is better seen in Figure 2 which shows a detail A of Figure 1. It is also envisaged that a gasket similar to the gasket 18
• the gasket 18 can in accordance with some embodiments extend to cover a part of the outside of the top 14 and/or box 12.
• the crisper 10 further comprises an automatic humidity control unit 16.
• the automatic humidity control unit 16 is adapted to automatically let some humidity out from the crisper 10 when the crisper is in a closed position as will be explained in more detail below.
• the crisper 10 is designed with minimum air exchange. This is achieved by providing an air tight seal between the box 12 and the top 14 when the crisper 10 is in a closed position. This sealed crisper is capable to get to the optimum storage environment that is needed by the fruits and/or vegetables as quickly as possible. This optimum storage environment is provided by a very low air flow inside crisper and optimum relative humidity. Fruits and vegetables stay fresh, tasty, and crisp. To control the humidity inside the sealed crisper 10 humid air is allowed to exit the crisper via the automatic humidity control unit 16 where the humidity control unit comprises a humidity control membrane.
• the humidity control unit 16 comprises a membrane 26 acting to control the humidity in the sealed crisper.
• the membrane 26 is designed to allow gases, including water vapor, to pass through from the inside of the sealed crisper to the outside of the sealed crisper 10. The only way that gases can exit from the crisper 10 when in a closed position is via the membrane 26.
• the provision of the membrane 26 is advantageous because completely sealing a crisper, especially when it is fully filled with fruits and/or vegetables, results in higher risk of condensation formation. To reduce this risk, the membrane 26 is introduced as automatic humidity controller.
• Figure 3 further depicts a liftable upper grid member 24 located on top of the membrane 26.
• the grid member 24 provides easy access to the membrane 26 for replacement of the membrane 26 while at the same time protecting the membrane.
• the grid member 24 is provided with holes to allow gases pass through the grid member 24.
• the membrane 26 is placed on top of the housing 28.
• the bottom of the housing 28 facing the interior of the box 12 is provided with holes to allow gases inside the box 12 reach the membrane located inside the humidity control unit 16.
• the crisper is typically placed in a refrigerator.
• the refrigerator cavity outside of crisper
• the sealed crisper filled with fruits/vegetables has high relative humidity. This creates vapor pressure gradient across the membrane 26. Over time, some water vapor from sealed crisper will be released to the dry refrigerator cavity thereby automatically controlling the humidity in the crisper 10.
• the humidity control can be said to be automatic because the humidity in the crisper 10 does not need any consumer input.
• relative humidity inside the crisper automatically changes. This will affect the vapor pressure gradient across the membrane 26. If the crisper is filled with leafy vegetables that creates very high relative humidity (>90%), more water vapor is transported across the membrane 26. If the crisper is filled with fruits which create medium relative humidity (75-90%), not as much water vapor is transported. By letting gases out from an otherwise sealed crisper via a membrane, the relative humidity of the crisper is reduced by 3-5%. With this reduction, condensation risk is minimized, which is advantageous because condensation is typically not desired.
• the membrane can be any suitable type of membrane allowing humid gases to pass at a pre-determined rate at a set humidity pressure gradient.
• One membrane that can be used is a Tyvek membrane.
• the membrane is made of spun PE threads which is pressed to form sheets.
• Tyvek 1056D is used. Such a material is difficult to tear thereby improving the robustness of the membrane.
• the size of the membrane should be designed to match the required level of humidity desired in the crisper.
• the size is set to between 5 - 10 cm 2 per liter of crisper volume, and in particular 6- 8 cm 2 per liter of crisper volume.
• a Tyvek 1056 D membrane having the size 7 cm 2 per liter of crisper volume can be used.
• FIGs 4 and 5 another embodiment of the crisper 10 is depicted.
• the crisper 10 in Figure 4 comprises two separate drawers 12 under a top 14.
• the crisper 10 in Figure 4 comprises two separate humidity control units 16, one for each drawer 12.
• the humidity control units 16 are here located on the sides of the top 14 as a difference to the embodiment of Figure 1 where the humidity control unit is located at the front of the top 14.
• FIG 5 an exploded view of the humidity control units 16 of Figure 4 is shown. As can be seen in Figure 5 also in this embodiment the membranes 26 can be easily accessed for replacement by simply lifting the top grid members 24.
• the crisper as described herein has numerous advantages.
• the crisper is sealed whereby a high humidity in the crisper is obtained. This is

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
• Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
• Storage Of Harvested Produce (AREA)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

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• 2016
  • 2016-12-19 WO PCT/EP2016/081692 patent/WO2018113899A1/en active Application Filing
  • 2016-12-19 CN CN201680091292.1A patent/CN110023699A/zh active Pending
  • 2016-12-19 EP EP16825368.0A patent/EP3555539A1/de active Pending
  • 2016-12-19 BR BR112019011838-1A patent/BR112019011838B1/pt active IP Right Grant
  • 2016-12-19 AU AU2016433678A patent/AU2016433678B2/en active Active
  • 2016-12-19 US US16/463,049 patent/US11543175B2/en active Active

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